County annual report · FIPS 45085
2024 Sumter County, SC Power Outage Report
In 2024, customers in Sumter County, SC went without power for an average of 4.9 hours, a total of 207K customer-hours (South Carolina average 50.1 hours). That ranks 37th worst of 46 South Carolina counties and 1641st of 2,990 nationally.
Compared with SC, the US and 2023
Coverage line is EAGLE-I's share of South Carolina customers tracked each year.
Biggest outages in Sumter County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 27, 2024 02:45 | September 30, 2024 02:30 | 2d 23h | 8,947 | 86K |
| 2 | July 27, 2024 21:45 | July 28, 2024 00:00 | 2h 15m | 3,151 | 3,148 |
| 3 | November 4, 2024 02:15 | November 4, 2024 05:15 | 3h | 2,778 | 8,329 |
| 4 | May 25, 2024 00:00 | May 25, 2024 09:00 | 9h | 2,642 | 3,333 |
| 5 | May 9, 2024 08:30 | May 10, 2024 03:15 | 18h 45m | 2,334 | 7,025 |
| 6 | June 24, 2024 13:15 | June 24, 2024 16:30 | 3h 15m | 2,195 | 1,102 |
| 7 | November 11, 2024 04:15 | November 11, 2024 05:15 | 1h | 1,590 | 1,397 |
| 8 | January 21, 2024 10:30 | January 21, 2024 20:45 | 10h 15m | 1,501 | 3,102 |
| 9 | November 7, 2024 05:15 | November 7, 2024 17:45 | 12h 30m | 1,366 | 4,670 |
| 10 | January 9, 2024 11:45 | January 11, 2024 03:15 | 1d 15h | 1,277 | 6,357 |
Outage episodes by size in 2024: 81 reached 100+ customers, 16 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Sumter County reported on EIA Form 861 for 2024, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Duke Energy Progress - (NC) | 2024 | 17.2 hrs | 1.70 | 2.2 hrs | 1.22 |
| Tri-County Electric Coop, Inc (SC) | 2024 | 17.4 hrs | 4.09 | 2.9 hrs | 2.33 |
| Black River Electric Coop, Inc - (SC) | 2024 | 3.8 hrs | 2.00 | 1.6 hrs | 1.35 |
| Duke Energy | - | - | - | - | - |
| City of Camden | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of South Carolina's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 42,515 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Sumter County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sumter County, SC annual power outage report, 2024, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2024/south-carolina/sumter-county